Cats display a variety of behaviors that communicate their emotional and physical states. Purring indicates happiness or a desire for attention from owners. Kneading shows contentment and relaxation, mimicking nursing behavior from kittens. Scratching serves to mark territory, stretch muscles, and trim claws. Hissing and growling signal threat or defense, while chattering expresses frustration or excitement such as when watching birds. Licking keeps cats clean and maintains social bonds with other cats. Pouncing is a natural hunting instinct especially in kittens. Rubbing releases scent glands to mark territory and show affection.